feat(cascadingprocessor): Added status code filtering to cascading filter processor

[chan-tim-sumo]

Links:

1. github issue: cascadingfilterprocessor should support filtering on trace status #1573
2. jira: https://sumologic.atlassian.net/browse/OSC-726
3. cascading filter processor

From the github issue, they wanted to be able to filter traces by status code for ROOT span only. Currently the only way to filter is to use minimum number of errors which basically checks the minimum number of errors within a trace, which isn't as great.

For example, if minimum number of errors is set to 1 (this means 1 or more errors):
Trace 1:

• span1 (root) = OK
• span2 = ERROR
• span3 = OK

Trace 2:

• span1 (root) = ERROR
• span2 = ERROR
• span3 = OK

This would return trace 1 and 2. But what they would want is to accept trace 2 only, with status code filtering, using the same example from above, will return trace 2 only.

[sumo-drosiek]

Just one more question. Is status_code case sensitive? Is it ok to type error, Error, eRRoR? If not, can we fix the user's input or raise an error?

wanted to comment 😓

[chan-tim-sumo]

Just one more question. Is status_code case sensitive? Is it ok to type error, Error, eRRoR? If not, can we fix the user's input or raise an error?

good point, added! Mentioned in the Readme that the values are "Error" "Ok" or "Unset" but can't completely rely on that :D

Output after throwing an error if a user uses status code as "ERROR" instead of "Error":

Error: failed to build pipelines: failed to create "cascading_filter" processor, in pipeline "traces/default": Invalid status code: must be one of 'Error', 'Ok', or 'Unset' 
2024/06/11 10:07:33 collector server run finished with error: failed to build pipelines: failed to create "cascading_filter" processor, in pipeline "traces/default": Invalid status code: must be one of 'Error', 'Ok', or 'Unset' 

link ref: https://github.com/open-telemetry/opentelemetry-collector/blob/main/pdata/ptrace/status_code_test.go#L12

[sumo-drosiek]

LGTM, one minor comment